OpenBSD 6.6 xlock loader.c LIBGL_DRIVERS_PATH privileges management

HistoryDiffrelatejsonxmlCTI

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in OpenBSD 6.6 and classified as critical. This affects an unknown function in the library xenocara/lib/mesa/src/loader/loader.c of the component xlock. The manipulation of the argument LIBGL_DRIVERS_PATH as part of Environment Variable results in privileges management. This vulnerability is reported as CVE-2019-19520. The attack requires a local approach. No exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in OpenBSD 6.6 (Operating System). Affected is an unknown code in the library xenocara/lib/mesa/src/loader/loader.c of the component xlock. The manipulation of the argument LIBGL_DRIVERS_PATH as part of a Environment Variable leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

xlock in OpenBSD 6.6 allows local users to gain the privileges of the auth group by providing a LIBGL_DRIVERS_PATH environment variable, because xenocara/lib/mesa/src/loader/loader.c mishandles dlopen.

The weakness was disclosed 12/05/2019 (oss-sec). The advisory is available at openwall.com. This vulnerability is traded as CVE-2019-19520 since 12/03/2019. Local access is required to approach this attack. A authentication is needed for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 03/07/2024). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries VDB-146681 and VDB-146683 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Operating System

Name

OpenBSD

Version

License

open-source

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/03/2019 🔍
12/05/2019 +2 days 🔍
12/05/2019 +0 days 🔍
03/07/2024 +1554 days 🔍

Sourcesinfo

Advisory: 155572
Status: Not defined

CVE: CVE-2019-19520 (🔍)
GCVE (CVE): GCVE-0-2019-19520
GCVE (VulDB): GCVE-100-146682
See also: 🔍

Entryinfo

Created: 12/05/2019 08:25
Updated: 03/07/2024 13:21
Changes: 12/05/2019 08:25 (40), 12/05/2019 08:30 (18), 03/07/2024 13:21 (3)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.